Just bought a 1989 Oliver 1650. The boat ran not bad but slow out of the hole. The seller stated that it had the wrong prop on - a 4 blade 23 degree and it should be a 19 degree. Also could only get 3000 RPM max and 27 MPH. Changed the prop to a 19 degree 3 blade. Can now only get 2800 RPM and 28 MPH. It seems to bog down at full throttle and runs better at 3/4 throttle?? In neutral it will rev up to 5000 RPM no problem, but not in gear?? After a long trailer ride to its new home, it now idles rough and stalls at idle. Apparently I'm running last years gas. Carb rebuilt last month and had lots of water and sludge in it. Plugs quite carbonned up so I changed to new ones. After 5 minutes of running they were getting carbonned up again?? Could the RPM / Idle problem be sludge in the tank and filter??
<br /><br />I once used a 1250gph mag-drive pond pump i had laying around. It is perfect because its epoxy sealed and its driven by a electro-magnetic field, so no exploding issues. Only thing is you need one of the $5 primer bulbs to get the pump started though. The pump is a centrifugal style so it has no suction till its primed. I pulled the inlet hose off my fuel pump, hooked up the tubing and primer bulb. Once its was primed, the pump sucked my tank dry in 1.5 minutes, so fast i though the tank would collapse if i hadn't opened the fill plate. You probably dont need to empty your tank this fast(nor did I) but you get the picture. So if you can get your hands on a utilty or pond pump, go for it. <br /><br />On a friends boat that was in his driveway, I used a siphon to empty the tank. Run a long hose over the side of the boat into your container. Just use a primer bulb and your on your way.<br /><br />What do you plan to pump into? A "friend's" boat? A PWC? Have fun!